Influence of ferroelectricity on the photoelectric effect of LiNbO{sub 3}

Journal Article · Mon Sep 01 00:00:00 EDT 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2978195· OSTI ID:21175553

Dunn, S; Tiwari, D ^[1]

---

1. Building 30, Nanotechnology Centre, Cranfield University, Cranfield MK43 0AL (United Kingdom)

A comparison between domain dependent photochemical and photoelectric cation reduction in LiNbO{sub 3} is presented. The reduction in photoelectric threshold for LiNbO{sub 3} due to the depolarization field allows UV irradiation to produce free electrons that can participate in photochemical reduction in silver nitrate. This is in addition to domain directed photophysics, where influences on the space charge layer due to the internal dipole of a ferroelectric determine the carrier at the surface. We show that the interaction of photoelectric and domain dependent influences is observed in LiNbO{sub 3} due to the low electron affinity ({approx}1-1.5 eV) and band bending (0.3-0.8 eV)

• OSTI ID: 21175553
• Journal Information: Applied Physics Letters, Vol. 93, Issue 9; Other Information: DOI: 10.1063/1.2978195; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CATIONS
DEPLETION LAYER
DEPOLARIZATION
DIPOLES
ELECTRONS
FERROELECTRIC MATERIALS
LITHIUM COMPOUNDS
NIOBATES
PHOTOCHEMISTRY
PHOTOELECTRIC EFFECT
SILVER NITRATES
SPACE CHARGE
ULTRAVIOLET RADIATION